Conveyer



P. GOEBELS May' 6, 1930.

CONVEYER obviated.l y reducing Patenten Meyfs, 1930 .UNITI-:D srA- 1 PAUL connus, or DESSAU,

GERMANY, ASSIGNOR TO 'TE FIBH' POLYSIUS, 0F

DEssAU, GEnMANY,' A .rBrNi-:nsnre coNvEYnn i Application led October 15, N26, Serial No. 141,817, and in Germany May 18, 1926'.

In the knownv constructions of conveying apparatus,in which a conveyer worm serves for the conveyance of flour-like goods in large quantity, the conveyer wormrotating in the 5`casing of the conveying apparatus is made in one piece with its driving shaft or is rigidly welded-to said shaft. The consequence thereof is, that, when the worm .is to be exchanged, this being frequently the case on account of vthe great wear,the apparatus as a vwhole must be taken apart; Practice has.

shown that the wear of the worm occurs very often when sharp goods, for instance cement,

is conveyed and accordingly the dismounting.

'15 of the whole apparatus must frequen Yy take place, this causing every time a longe standstill of operation and heavy expenses. Practice has further shown, that, when foreign bodies, for instance iron'particles, are p res- 2o ent in the conveying apparatus and gripped bythe worm, which is rigidly connected to the shaft, a large portion of the apparatus will break down.

This drawbackis obviatedby thepresent invention by making theA conveyerr `worm proper 1n one piece with a tube in such aman- Aner,.that said tube together with the worm is' loosely mounted on the hollow shaft and drivenbyy a special catching device. 39 the operation of such conveying appa- Yrat'us it has been found furtherthat immediately behind the conveyer worm strong 1 whirls arise. in the conveying tube conduit. These whirls are-produced especially at that f point, wherethe goods advanced by the conveyer worm meets with the entering compressedv air which is frequently employed in connection with the conveyorV screw. Natuff); annoying for the smoothc'onveyance of the goods. At this place lvery easily a stoppage rally said whirls are veryV detrimental and or even a complete stowing of the goods vto fbe conveyed may take place, so that the conveyance Will-temporarily be .entirely inter- 4f' rupted and` large'quantities of goods will be lost unnecessarily. Y A ,I By the resent invention this drawback is the diameter of the conveying tube con uit atI the dangerous n place behind the conveyer worm. t Theplace on which'in a smooth, unrestricted conduit the whirls arise, has a different position in regardto thev conveyerworm and depends on the kind', the weight and the quantity of the goods to be conveyed.

In the accompanying drawing, in which one formof construction of my invention is illustrated,

Fig'. 1 is a .diagrammatical view, partly section of my improved conveying apparatus,

Fig. 2 is a detail view of the conveyer worm arfd` the catching device, while Fig. 3 shows -means for producing anadjustable reduction of the diameter of the conveying tube conduit.

Y vIn the drawing 1 indicates the driving motor and 2 the worm shaft, which is hol- .low and may be connected in the known manner toa compressed air feeding tube. 4 indicates the casing ofthe conveying appa- A ratus, into which the goods to be conveyed are introduced through 'the funnel 5 in the known manner tvo-the conveying tube conduit 6, through whichthe goods to be conveyed are drivenmby means ofthe conveyor worm and eventually by compressed air to the point of delivery or consumption. On the hollow i ccnveyer worm shaft 2 is pushed loosely the tube 7 having the worm threads 8, said tube 30 and the worin threads being made from suitable material. At the end of the tube 7 catch- "ing cams 9 are provided, which engage with corresponding counter cams of the catching device 1 0.l The latter isrgidly connected to the hollow shaft by means of screwing, as indicated in Fig. 2, and accordingl carriesy along the loosely mounted worm tu e, when the shaft is-rotated. The catching cams of the catching device 10vare constructed in such a manner, that they serve as safety breaking devices, that means Vin case foreign bodies appear in the conveying apparatus, said cams are caused to break and the worm then comes f to a standstill, while the shaft, driven by the W motor, continues to rotate. By this construction greater damages areavoided and an exchange of the conveyer worm can be effected ina simple manner. VAfter the removal of` the tube part 11; an'd the loosening of the .catching device the worm conveyer ,7 and 8 may be drawn out and replaced Vby a new one.

In Fig. 3 the reference numeral 4 indi- Cates the casing of the known conveying apparatus, into which the shaft 13 with the conveyer Worm 14 projects. Compressed air may be supplied to the conveying tube conduit through the hollow shaft 13, While the goods to be conveyed are introduced into the conveying apparatus through the funnel 5, the

same as in the construction according to Fig. 1. 16 indicates the front end of the conveying tube conduit and 17 the continuation of said conduit. Within the tube part 16 the slidably arranged reducing tube 18 is provided, which restricts the cross sectional area of the tube conduit in the desired degree. The reducing tube 18 is connected by 2g brackets 19, which are guided in lateral slots 20 of the tube part 16, to the spindles 21 and may be displaced from the outside by turning the handwheels 22, so that the restricted part of the tube conduit can be approached to or removed from the end of the conveyer worm.

I claim:

A worm conveyer for Hour-like material, said conveyer comprising in combination, a driving shaft, a tube permanently connected with a conveyer worm, said tube together with said worm being adapted to be loosely pushed over said driving shaft, a conveying tube conduit arranged closely behind the end of said conveyer worm, a, tube of reduced cross-sectional area mounted within said conveying tube, and means for adjusting said tube of reduced cross-sectional area longitudinally within said'conveying tube. 40 In testimony whereof I aiiix my signature.

PAUL GOEBELS. 

